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Taxonomic group

Gripopterygidae: Zelandobius

Diagnostic features

Zelandobius stonefly nymphs have a rosette of anal gills between the cerci (“tails”). There are several species but they tend to be a uniform brown colour. They lack the hairy legs of Zelandoperla, the pale markings of Acroperla or Nesoperla, the subanal lobe spines of Megaleptoperla, or the thoracic lobes of Taraperla.

Typical habitats

Zelandobius nymphs can be found in a wide range of stony streams and rivers all over the country.


They are thought to be “collector-gatherers”, feeding on a range of organic matter accumulating on stream beds.

Indicator value

  • Hard bottom: 5
  • Soft bottom: 7.4

The tolerance values (ranging from 0 to 10) give an indication of which are the sensitive taxa (values of 8 or more) and which are the tolerant taxa (values of 3 or less). For more information see: Indicator species

Zelandobius species can be found in streams of moderate to good water quality. They have tolerance values of 5 (hard bottom sites) and 7.4 (soft bottom sites).